Weil McLain 510-312-090 Combination Operating Limit & Manual Reset High Limit

Description

The Weil McLain 510-312-090 is a combination operating limit and manual reset high limit control engineered specifically for use with Weil McLain boiler systems. This dual-function aquastat-style device integrates two critical safety and operating functions into a single, compact unit — simplifying installation while delivering dependable boiler temperature management.

Product Overview

The operating limit function automatically cycles the boiler burner on and off to maintain the desired system water temperature, while the manual reset high limit provides an added layer of protection by shutting down the burner if water temperature exceeds a safe threshold. Unlike automatic reset controls, the manual reset high limit requires a deliberate reset by a qualified technician, ensuring that the root cause of an overtemperature condition is identified and corrected before the system is returned to service.

Key Features

• Dual-function design combines operating limit and manual reset high limit in one control
• Manual reset high limit requires technician intervention after an overtemperature event
• Designed as a genuine OEM replacement for compatible Weil McLain boiler systems
• Simplifies wiring and installation compared to separate control components
• Provides reliable burner cycling for consistent system water temperature maintenance
• Enhances boiler safety by preventing operation under unsafe high-temperature conditions

Application

• Compatible with select Weil McLain residential and light commercial boiler models
• Suitable for hot water heating systems requiring dual-limit protection
• Ideal for service replacement on existing Weil McLain installations

Why Choose Genuine Weil McLain OEM Parts?

Using genuine Weil McLain replacement controls ensures proper fit, function, and compliance with the original equipment specifications. Aftermarket substitutes may not meet the precise calibration or safety standards required by your boiler system. The 510-312-090 is the correct factory-specified part for applicable Weil McLain models, helping maintain system warranty integrity and peak operational safety.